Lumenier 1800 mAh 4S 75C Lithium Polymer Battery with XT60 Connector and Connector Cover 1800 mAh 4S (14.8v nominal) Lithium-Polymer battery with an XT60 connector High performance discharge rate of 75C constant or 150C burst! Includes XT60 cover to prevent shorts in storage 104mm x 34mm x 30mm, 228g weight